Extech Instruments MO300 User manual

Brand: Extech Instruments

Model: MO300

Category: Measuring, testing & control

Type: User manual

Extech Instruments MO300 is a versatile moisture meter that combines pinless and pin-type moisture sensing, infrared temperature measurement, and humidity/temperature monitoring. It features a large dual display, Bluetooth connectivity, and 20-point internal memory. The pinless moisture sensor allows non-destructive moisture measurement of materials like wood, while the pin-type probe enables penetration into materials for deeper readings.

USERGUIDE



PinlessMoisture/HumidityMeter

withIRThermometer



BluetoothandAndroid

ready



ModelMO300



 

EXTECHINSTRUMENTS

MO300-en-GB_v1.4 7/16

Introduction

CongratulationsonyourpurchaseoftheExtechMO300withBluetoothcapabilitiesforusewiththe

AndroidApplicationExView™MO300.ThisPinlessMoistureMeterincorporatesaPatentedBuilt‐in

IRThermometerand20PointMemory.Monitormoistureinwoodandotherbuildingmaterials

withnosurfacedamagewiththePinlessMoisturesensor(Pin‐type MoistureProbeincluded).

MeasureHumidityandAirTemperaturewithbuilt‐inprobeplusnon‐contactInfraRedTemperature

withpatentedIRdesign.AdvancedfunctionsprovideGrainsperPound,DewPointandVapor

Pressurecalculations.Thismeterisshippedfullytestedandcalibratedand,withproperuse,will

provideyears

ofreliableservice.



MeterDescription

1. IRtemperaturesensor

2. Laserpointer

3. Humiditysensor

4. Temperaturesensor

5. LCDdisplay

6. RelativeHumiditybutton

7. Mode/ZeroButton

8. IRthermometerbutton

9. Alarmsetbutton

10. Alarmadjustdown/SENDbutton

11. ON/OFFpowerbutton

12. Remotepinprobeinputjack(bottom)

13. Battery

compartment(rear)

14. Alarmadjustup/Bluetoothbutton

15. Moisture/Relativebutton

Note:Protectivesensorcapnotpictured.



EXTECHINSTRUMENTS

MO300-en-GB_v1.4 7/16

LCDDisplayIcons

MINMAXREL–Minimum,Maximum,Relativevalues

HIGHLOW–Alarmlimits

INTEXT–Internal/Externalprobe

mBar–Vaporpressure

kPa–Vaporpressure

GPP–GrainsperPound

g/kg–Grainsperkilogram

MOIST–Moisturemode

RH%‐RelativeHumiditymode

COND–Condensationmode

APO–

AutopowerOFFfeature

DEW–DewPointtemperature

C/F–Temperatureunits

‐Lowbattery

MEM‐Memorylocationindicator

‐LaserpointerON

‐BluetoothON

Safety

 Useextremecautionwhenthelaserpointerbeamison

 Donotpointthebeamtowardanyone'seyeorallowthebeam

tostriketheeyefromareflectivesurface

 Donotusethelasernearexplosivegasesorinotherpotentially

explosiveareas



EXTECHINSTRUMENTS

MO300-en-GB_v1.4 7/16

Features

 QuicklyindicatesthemoisturecontentofmaterialswithPinlesstechnologywithout

damagingthesurface;

 OptionalremotePin‐typeprobe(MO290‐P)allowsformoisturereadingsatdifferent

penetrationlevels(3ft/0.9mcablelength);

 Easytoread,largedualdisplaywithbacklitfeature;

 Simultaneouslydisplays%moistureofwoodormaterialbeingtestedandAirTemperature,

IRTemperature,orHumidity

 DesignedwithpatentedIRdesigntomeasurenon‐contactsurfacetemperature;8:1

distancetospotratiowith0.95fixedemissivity

 Built‐inHumidity/TemperatureprobemeasuresRelativeHumidity,

 AirTemperatureplusGrainsPerPound(GPP)andDewPoint(DP)

 AmbientandSurfaceVaporPressure

 AutomaticcalculationofdifferentialTemperature(IR‐DP)

 Min/MaxandDataHold

 20pointinternalmemory

 Autopoweroffandlowbatteryindication



BatteryReplacement



1. Turnoffthemeter.

2. RemoveonerearPhilipsheadscrewandliftofftherearbatterycover.

3. Replacethe9Vbattery.

4. Securetherearbatterycover.



Neverdisposeofusedbatteriesorrechargeablebatteriesinhouseholdwaste.

Asconsumers,usersarelegallyrequiredtotakeused

batteriestoappropriate

collectionsites,theretailstorewhere thebatterieswerepurchased,or

whereverbatteriesaresold.

Disposal:Donotdisposeofthisinstrumentinhouseholdwaste.Theuseris

obligatedtotakeend‐of‐lifedevicestoadesignatedcollectionpointforthe

disposalofelectricalandelectronicequipment.





EXTECHINSTRUMENTS

MO300-en-GB_v1.4 7/16

Operation

Poweringthemeter

1. RemovetheRHsensorprotectivecapbeforeuse.

2. Pressthepower

buttontoturnthemeteron.

3. Ifthe symbolappearsorthemeterdoesnotturnon,replacethebattery.

Note:OperationwithBluetoothenabledreducesbatterylifetolessthan8hours.Usingan

externalACadaptorisrecommendedwhenthemeterwillbeusedformonitoringoveralong

periodoftime.



Humidity(Dewpoint,GPP,g/kg)Measurements

1. Pressthepower buttontoturnthemeteron.

2. PresstheRHbutton

3. RelativeHumiditywillbedisplayedintheprimarydisplayandthetemperaturewillbe

displayedinthesecondarydisplay.

4. Presstheupordownarrowbuttontochangethetemperatureunits.

5. PresstheMODEbuttonto

displaytheDEWpoint.

6. PresstheMODEbuttontodisplay GPP(°F)org/kg(°C).Pressthe▲or▼buttonto

togglebetweenGPPorg/kg.

PinlessMoistureMeasurements

1. Pressthepower buttontoturnthemeteron.

2. PresstheMOISTbuttontoselectMoisturemeasurement.”MOIST”,and“INT”(internal

pinlesssensor)willappearinthedisplay.

3. Holdthemetersothattherearsensorisawayfromanysurfaceoryourhand.Thereading

shouldbenear0.0.If

not,pressandholdtheZERObuttonformore than2secondandthe

ZEROiconappears.

4. Placetherearsensoronthesurfaceofthematerialtobetestedandreadtherelative

moisturecontent.

PinTypeMoistureMeasurements

1. Connecttheexternalpinprobetothejackonthebottomofthemeter.

2. Pressthepower

buttontoturnthemeteron.

3. PresstheMOISTbuttontwicetoselectMoisturemeasurement.”MOIST”,and“EXT”

(externalpinprobe)willappearinthedisplay.

4. Presstheprobepinsintothematerialandreadthe%moisturecontentinthedisplay.

EXTECHINSTRUMENTS

MO300-en-GB_v1.4 7/16

InfraredTemperatureMeasurements

1. Pressthepower buttontoturnthemeteron.

2. PresstheIRTbuttontoenabletheIRthermometerandthelaserpointer.Thelaserpointer

iconwillflashwhilethemodeisactive.

3. Pressthe▲or▼buttontochangethetemperatureunits

4. Aimthelaserpointeratthesurface

tobemeasuredandreadthesurfacetemperaturein

thesecondarydisplay.

5. ReleasetheIRTbutton.Thelasttemperaturemeasuredandthelasericonwillremainon

thedisplayforapproximately10secondsbeforereturningtoambienttemperature

measurement.

IRTMAXMINdisplay:

Themetercanbesettodisplay

onlythemaximumorminimumtemperaturemeasuredduring

anIRscan.

1. WiththemeterintheIRholdmode,presstheMODEbutton.“MIN”willappearinthe

display.

2. PresstheIRTbuttontoenabletheIRthermometer.Themeterwilldisplaytheminimum

temperaturemeasuredandwill

updateonlywhenalowertemperatureismeasured.

3. PresstheMODEbuttontwicetoenabletheMAXmodeandproceedasstatedabovefor

themaximumtemperature.

4. TheMAXorMINtemperatureisnotstoredwhenthefunctionisexited.Theunit

automaticallyexitsMAX/MINmodeafterapproximately10

seconds.

EXTECHINSTRUMENTS

MO300-en-GB_v1.4 7/16

IRFieldofView

Ensurethatthedesiredtargetislargerthanthespotsize.Asthedistancefromanobject

increases,thespotsizeoftheareameasuredbythemeterbecomeslarger.Themeter’sfieldof

viewratiois8:1,meaningthatifthemeteris8inches(cm)fromthetarget,thediameter(spot)

oftheobjectundertestmustbeatleast1inch(cm).Referbelowtothefieldofviewdiagram.



WARNING:Donotdirectlyviewordirectthelaserpointerataneye.Lowpowervisiblelasers

donotnormallypresentahazard,butmaypresentsomepotentialforhazardifvieweddirectly

forextendedperiodsoftime.



CondensationMode

TheCondensationfeaturealertstheuserwhenthesurfacetemperatureasmeasuredbytheIR

thermometerisclosetoorhasreachedtheDewPointtemperature.

1. Pressthepower buttontoturnthemeteron.

2. SimultaneouslypresstheMOISTandRHbuttons.The“COND”iconwillappear. 

3. Pointthemeteratasurface,presstheIRTbuttontomeasurethesurfacetemperature.The

smalldisplaywillindicatetheIRsurfacetemperatureandthelargedisplaywillindicate

the

differencebetweentheIRtemperatureandtheDewPointtemperature.

4. Themeterwillthenreportthepotentialforcondensationonthatsurfaceinthefollowing

manner

 IfthetemperatureoftheIRTismorethan14°C(25°F)abovetheDewPoint,the

temperaturedifferenceshallbedisplayed,withnootherwarning.

 IfthetemperatureoftheIRTis3‐14°C(5‐25°F)abovetheDewPoint,thetemperature

differenceshallbedisplayed,alongwithastandardCondensationIndicatoricon.The

metershallbeeponcetoconfirmthatthereadingisintheriskarea.

 Ifthe

temperatureoftheIRTislessthan3°C(5°F)abovetheDewPoint,thetemperature

differenceshallbedisplayed,alongwithaflashingCondensationIndicatoricon.The

metershallbeeptwicetoconfirmthatthereadingisinthehigh‐riskarea.

5. PresstheRHbuttontoexitthemode.



1” @ 8”

2” @ 16”

20mm @ 160mm

40mm @ 320mm

EXTECHINSTRUMENTS

MO300-en-GB_v1.4 7/16

VaporPressureMode

AmbientVaporPressure

1. WiththeCondensationmodeactive,presstheMODEbuttontodisplaytheVaporPressure

inmBAR(°F)orkPa(°C).Pressthe▲or▼buttontotogglebetweenmBARandkPa.

2. PresstheMODEbuttontoexittheVaporPressuremode.

SurfaceVaporPressure

1. Enter

theVaporPressuremodeasdescribedabove.

2. PresstheIRTbuttonandaimthelaserpointeratthesurfacetobemeasuredtodisplay

theSurfaceVaporPressureinmBAR(°F)orkPa(°C).

AlarmHighandLowLimitSetting

HighandLowalarmpointscanbesetforHumidityandMoisturemeasurements.

HumidityAlarmSetProcedure:

1. WithRH%displayed,simultaneouslypresstheRHandMODEbuttons.

2. The“HIGH”iconwillappearonthedisplay.

3. Pressthe▲or▼buttontosetthehighlimitdesired.

4. Press

theSTORE/ALARMSETbuttontosavethevalueandproceedtotheLOWsetvalue.

5. Withthe“LOW”iconinthedisplay,Pressthe▲or▼buttontosetthelowlimitdesired.

6. PresstheSTORE/ALARMSETbuttontosavethevalueandtoreturntothenormal

mode.

7. Ifthehumiditymeasurementislowerthanthelowalarmsettingorhigherthanthehigh

alarmsetting,themeterwillbeeponceeverysecond.



MoistureAlarmSetProcedure

1. WithMOISTdisplayed,simultaneouslypresstheMOISTandMODEbuttons.

2. The“HIGH”iconwillappearonthedisplay.

3. Pressthe▲or▼buttontosetthehighlimitdesired.

4. PresstheSTORE/ALARMSETbuttontosavethevalueandproceedtotheLOWsetvalue.

5. With

the“LOW”iconinthedisplay,Pressthe▲or▼buttontosetthelowlimitdesired.

6. PresstheSTORE/ALARMSETbuttontosavethevalueandtoreturntothenormalmode.

7. IfthemoisturemeasurementislowerthantheLOWalarmsetting,themeterwillbeep

once

everysecond

8. IfthemoisturemeasurementishigherthantheHIGHalarmsetting,themeterwillbeep

continuously.

EXTECHINSTRUMENTS

MO300-en-GB_v1.4 7/16

DataMemoryStorage

StoringReadings:

1. Withthedatatobesavedinthedisplay,presstheSTOREbuttonfor2secondsuntiltheunit

beeps.Thedatawillbesavedtothememorylocationindicated.Thenumericdisplayabove

theMEMiconwillthenadvancetothenextlocation.

2. Whenthe20

memorylocationsarefull,theunitwilloverwriteoldsavedreadingsstarting

withmemorylocation01. 

RecallingStoredReadings:

1. Simultaneouslypressandreleasethe▲and▼buttonstodisplaystoredreadings.The

numericdisplayabovetheMEMiconwillflashandthedatastoredinthatlocationwillbe



displayed.

2. Pressthe▲or▼buttontoscrollthroughthememorylocations.

3. Toreturntonormaloperatingmode,presstheSTOREbutton.

ClearingStoredData:

1. Toclearstoreddata,pressandholdthe▲andSTOREbuttonssimultaneouslyuntilCLR

appearsonthedisplay.

AutoPowerOff

Themeterwillenterasleepmodeafter30minutesofinactivity.Themeterwillemitawarning

beep15secondsbeforeshuttingdown.

TodisabletheAPOfeature,presstheMODEbuttonwhenturningthemeterON.The“APO”icon

willnotappear,indicatingitisdisabled.



Bluetooth

andAndroid

Communication

ThismeterincludesaBluetoothmoduledesignedtocommunicatewithanAndroidApplication

ExView™MO300.GetthisAppfromtheGooglePlaystore.



1. EnabletheMO300Bluetoothbypressingandholdingthe▲buttonfortwoseconds. The

Bluetoothiconwillappearinthedisplay.

2. PairthemetertotheAndroidtablet.Usepairingcode1234.

3. StarttheExView™MO300App.Tap“Connect”icon

topairthemeterwiththeApp.

4. Oncepaired,thedatafromtheMO300willbecontinuouslydisplayed andupdatedonthe

AndroidAppExView™MO300.

TypicalMoistureMeasurementandDocumentationProcedures

1. UsetheMoisturemetertomeasurethemoisturelevelsatvarioussuspectlocations.

2. Whenaspotofinterestislocated,storethemoisturereadinginthemoisturemeter’s

memory.

3. Recallthereadingfrommemory.Themoisturemeterwillnowcontinuouslytransmitthis

readingviaBluetooth.

EXTECHINSTRUMENTS

MO300-en-GB_v1.4 7/16

FCCCOMPLIANCE

FCCID:IWK‐MO300

Thisdevicecomplieswithpart15oftheFCCRules.Operationissubjecttothefollowingtwo

conditions:

1.Thisdevicemaynotcaus e harmfulinterference.

2.Thisdevicemustacceptanyinterferencereceived,includinginterferencethatmaycause

undesiredoperation.

Thisequipmenthasbeentestedand

foundtocomplywiththelimitsforaClassBdigitaldevice,

pursuanttopart15oftheFCCRules.Theselimitsaredesignedtoprovidereasonableprotection

againstharmfulinterferenceinaresidentialinstallation.

Thisequipmentgenerates,uses,andcanradiateradiofrequencyenergyharmfulinterferenceto

radiocommunications.

However,thereisnoguaranteethatinterferencewillnotoccurina

particularinstallation.Ifthisequipmentdoescauseharmfulinterferencetoradioortelevision

reception,whichcanbedeterminedbyturningtheequipmentoffandon,theuseris

encouragedtotrytocorrecttheinterferencebyoneormore

ofthefollowingmeasures:

•Reorientorrelocatethereceivingantenna.

•Increasetheseparationbetweentheequipmentandreceiver.

•Connecttheequipmentintoanoutletonacircuitdifferentfromthattowhichthereceiveris

connected.

•Consultthedealeroranexperiencedradio/TVtechnicianforhelp.



FCCRadiationExposureStatement

1. Thistransmittermustnotbeco‐locatedoroperatinginconjunction withanyotherantenna

ortransmitter.

2. This equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled

environment.

3. To maintain compliance with FCC RF exposure compliance requirements, avoid direct contact

to the transmitting antenna during transmission.



WARNING:Changesormodificationsnotexpresslyapprovedbythepartyresponsiblefor

compliancecouldvoidtheuser'sauthoritytooperatetheequipment.

EXTECHINSTRUMENTS

MO300-en-GB_v1.4 7/16

INDUSTRYCANADA(IC)COMPLIANCE

ICID:1590A‐MO300

ThisdevicecomplieswithIndustryCanadalicense‐exemptRSSstandard(s).Operationissubject

tothefollowingtwoconditions:(1)thisdevicemaynotcauseinterference,and(2)thisdevice

mustacceptanyinterference,includinginterferencethatmaycauseundesiredoperationofthe

device.

CAUTION:ICRadiationExposureStatement

1. Thistransmittermustnotbeco‐locatedoroperatinginconjunction withanyotherantenna

ortransmitter.

2. ThisequipmentcomplieswithRSS102RFradiationexposurelimitssetforthforan

uncontrolledenvironment.

3. TomaintaincompliancewithRSS102RFexposurecompliancerequirementsavoiddirect

contacttothetransmittingantennaduringtransmission.

Specifications

Function Range Accuracy

PinlessMoisture 0to99.9 Relativeonly

External‐Moisturein

wood

6‐99% ±5%

External‐Moisturein

buildingmaterials

13‐99% ±5%

PinlessDepth Upto0.75”(19mm)

RHMeasurement 0to10% ±3%RH

11to90% ±2.5%RH

91to100% ±3%RH

AirTemperature

‐29to77°C(‐20to170°F)

2.0C(3.6F)

IRTemp

‐4to31F9F

32°F ±2°F

33to392F Greaterof3.5%or9F

‐20to‐1C 4.5C

0C 1C

1to200C

Greaterof±3.5%or±4.5°C

EXTECHINSTRUMENTS

MO300-en-GB_v1.4 7/16

Display 3‐digitprimarydisplay,4‐digitsecondarydisplay

VaporPressure 0to20.0kPA,calculatedfromtemperatureandRHmeasurements

DewPoint‐22to199°F(‐30to100°C)

MixingRatio 0to160g/kg(0‐999GPP[grainsperpound])

SampleRate 2persecond

Backlight WhiteLED

Memory 20point

memory

Bluetoothrange 10m(32feet)approximately

OperatingTemperature 4to43°C(40to110°F)

StorageTemperature‐30to60°C(‐14to140°F)

OperatingHumidity: 90%:0‐30°C(32‐86°F)

 75%:30‐40°C(86‐104°F)

 45%:40‐50°C(104‐122°F)

StorageHumidity 90%

PowerSupply 9Vbattery

Auto

PowerOff(APO) After30min.ofinactivity.APOfunctioncanbedisabledbytheuser.

APOQuiescentCurrent 50µAmaximum

Dimensions 165x70x38mm(6.5x2.8x1.5’’)

Weight 210g(7.4oz.)

Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform

ISO‐9001Certified

www.extech.com



Extech Instruments MO300 User manual

Brand: Extech Instruments

Model: MO300

Category: Measuring, testing & control

Type: User manual

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Extech Instruments MO300 User manual

Extech Instruments MO300 User manual

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